The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 2013
Filed:
Aug. 04, 2011
Shun Taniguchi, Tokyo, JP;
Kazuya Yasui, Kanagawa-ken, JP;
Kazuaki Yuuki, Saitama-ken, JP;
Yosuke Nakazawa, Tokyo, JP;
Shun Taniguchi, Tokyo, JP;
Kazuya Yasui, Kanagawa-ken, JP;
Kazuaki Yuuki, Saitama-ken, JP;
Yosuke Nakazawa, Tokyo, JP;
Toshiba Corporation, Tokyo, JP;
Abstract
A control device of a synchronous machine is disclosed. The control device includes an inverter configured to provide an output current to a synchronous machine. A controller configured to control the output current and to estimate a voltage command, at least in part, by using pulse width modulation to choose a non-zero vector at a time when the inverter is not driving the synchronous machine with the output current. The estimating the voltage command is performed without using a zero vector. A phase angle and angular velocity estimating section configured to estimate a phase angle and an angular velocity of a rotor of the synchronous machine based, at least in part, on an inductance value, an induction voltage value, the voltage command, and the output current. The controller is further configured to control the output current based, at least in part, on the phase angle and the angular velocity.